As January goes, so goes the rest of the year is a well known Street factoid, but top-performing...

As January goes, so goes the rest of the year is a well known Street factoid, but top-performing sectors in January also tend to outperform for the rest of the year, according to Sam Stovall. Ever-changing cycles: It's so well known small caps outperform large caps in January, now the move begins in mid-December, writes J.C. Parets. In fact this year, the Russell 2000 started outperforming in mid-November! Time to drop this sure thing.